LP3872ESX-3.3

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LP3872ESX-3.3/NOPB is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, providing a stable 3.3 V output with a maximum continuous current of 1.5 A. It operates within an input voltage range of 2.5 V to 7 V and features ultra-low dropout characteristics, typically 38 mV at 150 mA and 380 mV at 1.5 A load. The device incorporates a shutdown mode that reduces quiescent current to 10 nA, ensuring minimal power consumption when inactive. Built on a CMOS process, it includes integrated overcurrent and overtemperature protection mechanisms.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low dropout voltage performance for efficient operation under minimal input-to-output differential conditions
• Integrated shutdown control pin enabling deep sleep mode with negligible quiescent current draw
• Built-in error flag output to signal loss of regulation due to thermal or current limiting events
• Robust protection circuitry including short-circuit current limiting and thermal shutdown

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Microprocessor power supply rails
• GTL, GTL+, BTL, and SSTL bus terminators
• Power supplies for digital signal processors (DSPs)
• SCSI bus terminators
• Post-regulators in high-efficiency linear systems

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'ESX' corresponds to the TO-263 (DDPAK-5) surface-mount package variant. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance status as per the manufacturer's latest documentation. Ensure the ordering part number matches the required output voltage tolerance and package type for your design implementation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for applications requiring fast transient response and high efficiency from a linear topology. The LP3872 lacks a remote sense pin; therefore, it is best suited for loads located physically close to the regulator to avoid trace resistance voltage drops. Consider the LP3875 series if remote voltage sensing capabilities are necessary for long PCB traces.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This device belongs to the LP387x family of fast ultra-low-dropout linear regulators developed on a CMOS process. The family includes variants such as the LP3872 and LP3875, which share similar electrical characteristics but differ in pin configurations and additional features like remote sensing. The LP3872 specifically provides an error flag for system monitoring.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LP3875ESX-3.3/NOPB: Offers identical electrical performance but includes a SENSE pin for remote voltage regulation.